A method for preparing ceramsite from primer wet powder

Abstract

The present invention provides a method for preparing ceramsite from primer wet powder, which includes: 1) drying, grinding and homogenizing raw materials to obtain a mixture for standby; 2) adding manganese powder to the obtained mixture to obtain a well-homogenized dry powder; 3) making some of the obtained dry powder into wet powder coarse particles through a wet powder machine; 4) dispersing the obtained wet powder coarse particles through a dispersing device to make tiny particle primer wet powder; 5) adding the obtained primer wet powder to a granulating pan, and then adding the remaining dry powder to form balls. During the ball-forming process, an appropriate amount of water is added in 1-3 times to make the humidity meet the granulating requirements, and semi-finished product particles are obtained through ball-forming; 6) the semi-finished product particles obtained through a rotary screen are classified to complete granulation; 7) the screened particles are placed in a kiln for firing to obtain finished ceramsite products. This invention uses a well-homogenized dry powder to quickly make particles of different sizes through a wet powder machine. The dry powder quickly becomes particles containing a certain amount of moisture through the closed wet powder machine, effectively suppressing the problem of dust flying, saving time and energy consumption.

Description

Technical Field

[0001] The present invention belongs to the field of granular building materials, and particularly relates to a method for preparing ceramsite from primer wet powder. Background Art

[0002] Ceramsite is a kind of inorganic light aggregate, mainly used in building engineering for heat insulation, lightweight walls, lightweight aggregate concrete, structural concrete, etc., and can also be used in environmental protection filtration, agricultural planting and building decoration and other fields.

[0003] Currently, there are many methods for preparing ceramsite. The raw materials are mixed, ground, crushed, finely ground, etc. to become the dry powder for producing ceramsite. During this process, the dust is particularly large, which is likely to cause environmental pollution. During the process of making ceramsite from this dry powder, it is necessary to repeatedly check the roundness and smoothness of the product, with high energy consumption and long time. Summary of the Invention

[0004] In order to solve the above technical problems, the present invention provides a method for preparing ceramsite from primer wet powder, and its technical solution is as follows:

[0005] A method for preparing ceramsite from primer wet powder, comprising the following steps:

[0006] 1) Dry and grind the raw materials for homogenization treatment to obtain a mixture for standby;

[0007] 2) Add manganese powder to the mixture obtained in step 1) and stir evenly to obtain a well-homogenized dry powder;

[0008] 3) Take a part of the dry powder obtained in step 2) and make it into wet powder coarse particles through a wet powder machine, wherein the wet powder machine controls the moisture content at 7%-12%;

[0009] 4) Disperse the wet powder coarse particles obtained in step 3) through a dispersing device to make tiny particle primer wet powder; the particle size of the primer wet powder is 1-5 mm;

[0010] 5) Add the primer wet powder obtained in step 4) to a granulating pot, and then add the remaining dry powder obtained in step 2) for ball forming. During the ball forming process, add an appropriate amount of water in 1-3 times to make the humidity reach the granulation requirement; semi-finished product particles are obtained after ball forming;

[0011] 6) Complete granulation by grading the semi-finished product particles obtained in step 5) through a rotary screen;

[0012] 7) Place the screened particles into a kiln for firing to obtain the finished ceramsite product.

[0013] Preferably, in step 1), the proportion of each component in the mixture is as follows: Al2O3≥63%, TiO2≤5%, SiO2≤7%, Fe2O3≤8%, MnO2≥2%.

[0014] Preferably, in step 2), the mixture and manganese powder are placed in a mixer and stirred for 20 to 50 minutes.

[0015] Preferably, in step 3), the wet powder machine works for 3 - 5 minutes.

[0016] Preferably, in step 7), the kiln temperature is between 1280 °C and 1300 °C, and it is fired for 90 - 110 minutes and then cooled.

[0017] Preferably, the structure of the dispersing device adopted in step 4) is as follows: it includes a fixed base, a dispersing machine housing, dispersing machine blades, a bearing box, and a driving device;

[0018] The dispersing machine housing and the driving device are jointly fixed on the fixed base, and the bearing box penetrates through the dispersing machine housing and is relatively fixed; the dispersing machine blades are located inside the dispersing machine housing, and its driving end is connected to the rotating shaft inside the bearing box; the rotating shaft is connected to the driving device through a transmission mechanism;

[0019] An inclined opening feeding port is provided on the upper front surface of the dispersing machine housing, and a first cleaning door and a second cleaning door are respectively opened at the transition joints between the upper two side surfaces and the top of the dispersing machine housing, which also serve as observation doors;

[0020] The width dimension of the lower part of the dispersing machine housing gradually decreases from top to bottom. The two sides at the connection between the lower part and the upper part of the dispersing machine housing form an extension plane in the width direction, and a third cleaning door and a fourth cleaning door are respectively opened on the two extension planes;

[0021] A discharge port is opened on the lower end plane of the dispersing machine housing.

[0022] Preferably, the driving device adopts a motor, the transmission mechanism adopts a pulley and a transmission belt. The pulley is relatively fixed to the rotor of the motor, and both ends of the transmission belt are respectively wound around the pulley and the rotating shaft inside the bearing box.

[0023] Preferably, the opening plane of the feeding port is rectangular, and the area of the feeding port occupying the upper front surface of the dispersing machine housing is a trapezoid with a wider upper part and a narrower lower part.

[0024] Preferably, the lower part of the dispersing machine housing is an isosceles trapezoid.

[0025] Preferably, the height position of the rotating shaft inside the bearing box is flush with the third cleaning door and the fourth cleaning door.

[0026] Compared with the prior art, the present invention has the following beneficial effects:

[0027] The homogenized dry powder is passed through a wet powder machine to quickly produce particles of different sizes. The wet powder machine can control the moisture content at 7%-12%. Coarse particles are produced in 3-5 minutes. The dry powder quickly becomes particles containing a certain amount of moisture through the closed wet powder machine, effectively suppressing the problem of dust emission.

[0028] Furthermore, the particles are dispersed by a dispersing device to produce wet powder as a primer containing a certain amount of moisture and fine particles. After dispersion, the fine particles have a certain strength, which is beneficial for making high-density and high-strength particles.

[0029] Furthermore, using the wet powder as a primer can save the time for the dry powder to become uniform wet powder, thereby saving energy, reducing energy consumption, and saving time. BRIEF DESCRIPTION OF THE DRAWINGS

[0030] In order to more clearly illustrate the technical solutions in the embodiments of the present application or the prior art, the following will briefly introduce the drawings required for the description of the embodiments or the prior art. Obviously, the drawings in the following description are some embodiments of the present application. For those of ordinary skill in the art, without creative efforts, other drawings can also be obtained based on these drawings.

[0031] Figure 1 It is a schematic diagram of the overall structure of the dispersing device provided by the present invention;

[0032] Figure 2 It is a schematic view of one perspective of the dispersing device provided by the present invention;

[0033] Figure 3 It is a schematic view of another perspective of the dispersing device provided by the present invention.

[0034] 1 - Fixed base, 2 - Disperser housing, 3 - Bearing box, 4 - Motor, 5 - Pulley, 6 - Belt, 7 - Feed inlet, 8 - Discharge outlet, 9 - First cleaning door, 10 - Second cleaning door, 11 - Third cleaning door, 12 - Fourth cleaning door. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0035] To make the objectives, technical solutions, and advantages of the embodiments of the present invention clearer, the following will clearly and completely describe the technical solutions in the embodiments of the present invention with reference to the drawings in the embodiments of the present invention. Obviously, the described embodiments are some, but not all, of the embodiments of the present invention. All other embodiments obtained by those of ordinary skill in the art without creative efforts based on the embodiments of the present invention belong to the scope of protection of the present invention.

[0036] To solve the problems of long dry powder granulation time, high energy consumption, and large dust emission, the technical solutions provided by the present invention are as follows:

[0037] A method for preparing ceramsite with primer wet powder, comprising the following steps:

[0038] 1) Dry, grind and homogenize the raw materials to obtain a mixed material for standby;

[0039] 2) Add manganese powder to the mixed material obtained in step 1) and stir evenly to obtain a well-homogenized dry powder;

[0040] 3) Take a part of the dry powder obtained in step 2) and make it into wet powder coarse particles through a wet powder machine, wherein the moisture content of the wet powder machine is controlled at 7%-12%;

[0041] 4) Disperse the wet powder coarse particles obtained in step 3) through a dispersing device to make primer wet powder with tiny particles; the particle size of the primer wet powder is 1-5 mm;

[0042] 5) Add the primer wet powder obtained in step 4) into a granulating pot, and then add the remaining dry powder obtained in step 2) to form balls. During the ball-forming process, add an appropriate amount of water in 1-3 times to make the humidity reach the granulation requirement; semi-finished product particles are obtained after ball-forming;

[0043] 6) Complete granulation by classifying the semi-finished product particles obtained in step 5) through a rotary sieve;

[0044] 7) Place the sieved particles into a kiln and fire to obtain the finished ceramsite product.

[0045] Preferably, in step 1), the proportion of each component in the mixed material is as follows: Al2O3≥63%, TiO2≤5%, SiO2≤7%, Fe2O3≤8%, MnO2≥2%.

[0046] Specifically in step 2), the mixed material and manganese powder are placed in a mixer and stirred for 20-50 minutes.

[0047] In step 3), the wet powder machine works for 3-5 minutes.

[0048] In step 7), the firing temperature in the kiln is between 1280°C and 1300°C, and it is fired for 90-110 minutes and then cooled.

[0049] Figure 1 It is the overall structural schematic diagram of the dispersing device provided by the present invention; Figure 2 It is a perspective schematic diagram of the dispersing device provided by the present invention; Figure 3 It is a schematic diagram of another perspective of the dispersing device provided by the present invention, as Figure 1 、 Figure 2 、 Figure 3As shown: the structure of the dispersing equipment used is as follows: it includes a fixed base 1, a dispersing machine housing 2, a dispersing machine blade, a bearing box 3 and a driving device; the dispersing machine housing 2 and the driving device are fixed on the fixed base 1, and the bearing box 3 penetrates the dispersing machine housing 2 and is relatively fixed; the dispersing machine blade is located in the dispersing machine housing 2, and its driving end is connected to the rotating shaft in the bearing box 3; the rotating shaft is connected to the driving device through a transmission mechanism;

[0050] The upper front of the dispersing machine housing 2 is provided with an inclined opening 7, and the transition points between the upper two side surfaces of the dispersing machine housing 2 and the top are respectively provided with a first cleaning door 9 and a second cleaning door 10, which also serve as observation doors;

[0051] The width of the lower part of the disintegrator housing 2 gradually decreases from top to bottom, and the two sides where the lower part of the disintegrator housing 2 and the upper part of the disintegrator housing 2 meet form an extension plane in the width direction, and the third cleaning door 11 and the fourth cleaning door 12 are respectively provided on the extension planes on both sides; the lower end plane of the disintegrator housing 2 is provided with a discharge port 8. The driving device adopts a motor 4, and the transmission mechanism adopts a pulley 5 and a transmission belt 6. The pulley 5 and the rotor of the motor 4 are relatively fixed, and the two ends of the transmission belt 6 are respectively connected to the pulley 5 and the rotating shaft in the bearing box 3. The opening plane of the feed port 7 is rectangular, and the area occupied by the feed port 7 on the front of the upper part of the disintegrator housing 2 is a trapezoid that is wide at the top and narrow at the bottom. The lower part of the disintegrator housing 2 is an isosceles trapezoid. The height position of the rotating shaft in the bearing box 3 is flush with the third cleaning door 11 and the fourth cleaning door 12.

[0052] The present invention is described in detail below in conjunction with embodiments:

[0053] Embodiment 1: A method for preparing ceramsite from wet starter powder, comprising the following steps:

[0054] 1. Raw material pretreatment:

[0055] The raw materials are dried, ground and homogenized to make Al2O3≥63%, TiO2≤5%, SiO2≤7%, Fe2O3≤8%, and MnO2≥2%. The fineness of the processed mixture is greater than 95% through a 300-mesh standard sieve, and the mixture is set aside.

[0056] 2. Stirring

[0057] Add manganese powder to the mixture, place it in a mixer and stir for 25 minutes until the mixture is uniform and a homogenized dry powder is obtained.

[0058] 3. Pass the homogenized dry powder through a wet powder machine, where it works for 4 minutes to make coarse wet powder particles, and the wet powder machine controls the moisture content to 5%.

[0059] IV. The obtained wet powder coarse particles are dispersed by a dispersing device to form the primer wet powder of tiny particles; the particle size of the primer wet powder is 5 mm.

[0060] V. Granulation

[0061] The obtained primer wet powder is added to a granulation pot, and the remaining dry powder is added to form balls. During the ball-forming process, an appropriate amount of water is added in 1 - 3 times to make the humidity reach the granulation requirement; semi-finished particles are obtained after ball-forming.

[0062] VI. The obtained semi-finished particles are classified to complete granulation.

[0063] VII. The sieved particles are placed into a kiln, fired at 1280 °C - 1300 °C for 90 minutes, cooled, screened, stored separately, and packaged into finished products.

[0064] The processes of the remaining Examples 2 to 6 are similar and will not be elaborated here.

[0065] As shown in the following table:

[0066]

[0067]

[0068] Note: The main indicators for the quality rating of the finished ceramsite include: uniformity, fire resistance, frost resistance, and durability.

[0069] In summary, by using the well-homogenized dry powder, different-sized particles are quickly made through a wet powder machine, thereby improving the granulation efficiency; the wet powder machine can control the amount of water at 7% - 12%, and coarse particles are made in 3 - 5 minutes; the dry powder quickly becomes particles containing a certain amount of water through the closed wet powder machine, effectively suppressing the dust problem.

[0070] The particles are dispersed by a dispersing device to form the primer wet powder containing a certain amount of water and tiny particles. After dispersion, the micro-particles have a certain strength, which is beneficial for making high-density and high-strength particles.

[0071] The primer wet powder is added to the granulation pot, and then a small amount of dry powder and water are further added to make semi-finished particles, and then the semi-finished particles are classified by a rotary screen to complete granulation. Using the primer wet powder for production can save the time for the dry powder to become uniform wet powder, thus saving energy.

[0072] Finally, it should be noted that: the above embodiments are only used to illustrate the technical solutions of the present application, rather than to limit it; although the present application has been described in detail with reference to the foregoing embodiments, those of ordinary skill in the art should understand that: they can still modify the technical solutions described in the foregoing embodiments, or perform equivalent replacements on some or all of the technical features; and these modifications or replacements do not make the essence of the corresponding technical solutions deviate from the scope of the technical solutions of the embodiments of the present application.

Claims

1. A method for preparing ceramsite with primer wet powder, characterized in that, It includes the following steps: 1) Dry, pulverize and homogenize the raw materials to obtain a mixed material for standby; 2) Add manganese powder to the mixed material obtained in step 1) and stir evenly to obtain a well-homogenized dry powder; 3) Take a part of the dry powder obtained in step 2) and make it into wet powder coarse particles through a wet powder machine, where the moisture content of the wet powder machine is controlled at 7%-12%; 4) Disperse the wet powder coarse particles obtained in step 3) through a dispersing device to make them into primer wet powder with tiny particles; the particle size of the primer wet powder is 1-5 mm; 5) Add the primer wet powder obtained in step 4) to a granulating pot, and then add the remaining dry powder obtained in step 2) to form balls. During the ball-forming process, add an appropriate amount of water in 1-3 times to make the humidity reach the granulating requirements; semi-finished product particles are obtained after ball-forming; 6) Complete granulation by classifying the semi-finished product particles obtained in step 5) through a rotary sieve; 7) Place the sieved particles into a kiln and fire to obtain finished ceramsite products.

2. The method for preparing ceramsite from primer wet powder according to claim 1, characterized in that, In step 1), the proportion of each component in the mixed material is as follows: Al2O3≥63%, TiO2≤5%, SiO2≤7%, Fe2O3≤8%, MnO2≥2%.

3. A method for preparing ceramsite from primer wet powder according to claim 1, characterized in that, Specifically in step 2), the mixed material and manganese powder are placed in a mixer and stirred for 20-50 minutes.

4. A method for preparing ceramsite from primer wet powder according to claim 1, characterized in that, In step 3), the wet powder machine works for 3-5 minutes.

5. A method for preparing ceramsite from primer wet powder according to claim 1, characterized in that, In step 7), the firing temperature in the kiln is between 1280°C and 1300°C, and it is fired for 90-110 minutes and then cooled.

6. A method for preparing ceramsite from primer wet powder according to claim 1, characterized in that, The structure of the dispersing device adopted in step 4) is as follows: it includes a fixed base, a dispersing machine housing, dispersing machine blades, a bearing box and a driving device; The dispersing machine housing and the driving device are jointly fixed on the fixed base, and the bearing box penetrates through the dispersing machine housing and is relatively fixed; the dispersing machine blades are located inside the dispersing machine housing, and its driving end is connected to the rotating shaft inside the bearing box; the rotating shaft is connected to the driving device through a transmission mechanism; An inclined opening feeding port is arranged on the upper front surface of the dispersing machine housing, and a first cleaning door and a second cleaning door are respectively arranged at the transition connection between the upper two side surfaces and the top of the dispersing machine housing, which also serve as observation doors; The width dimension of the lower part of the dispersing machine housing gradually decreases from top to bottom. The two sides at the connection between the lower part and the upper part of the dispersing machine housing form an extension plane in the width direction, and a third cleaning door and a fourth cleaning door are respectively arranged on the two extension planes; A discharge port is arranged on the lower end plane of the dispersing machine housing.

7. A method for preparing ceramsite from primer wet powder according to claim 6, characterized in that, The driving device adopts a motor, and the transmission mechanism adopts a pulley and a transmission belt. The pulley is relatively fixed to the rotor of the motor, and the two ends of the transmission belt are respectively wound around the pulley and the rotating shaft inside the bearing box.

8. A method for preparing ceramsite from primer wet powder according to claim 6, characterized in that, The opening plane of the feeding port is rectangular, and the area of the feeding port occupying the upper front surface of the dispersing machine housing is a trapezoid with a wider upper part and a narrower lower part.

9. A method for preparing ceramsite from primer wet powder according to claim 6, characterized in that, The lower part of the dispersing machine housing is an isosceles trapezoid.

10. A method for preparing ceramsite from primer wet powder according to claim 6, characterized in that, The height position of the rotating shaft inside the bearing box is flush with the third cleaning door and the fourth cleaning door.

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